Receptacle adapter



FIG. 1 is a front elevational view of a receptacle adapter;

FIG. 2 is a top view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left elevational view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a rear view thereof.

The broken line environmental showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a receptacle adapter, as shown and described. 